#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#define NUM_SUBJECTS 5 // จำนวนวิชา
#define NUM_STUDENTS 5 // จำนวนนักเรียน
 
struct Student {
    char name[50];
    char subjects[NUM_SUBJECTS][50];
    float grades[NUM_SUBJECTS];
    struct Student *next;
};
 
// ฟังก์ชันสร้าง Node ใหม่
struct Student* createNode() {
    struct Student* newNode = (struct Student*)malloc(sizeof(struct Student));
    printf("ป้อนชื่อนักเรียน: ");
    scanf("%s", newNode->name);
    for (int i = 0; i < NUM_SUBJECTS; i++) {
        printf("ป้อนชื่อวิชาที่ %d: ", i+1);
        scanf("%s", newNode->subjects[i]);
        printf("ป้อนคะแนน: ");
        scanf("%f", &newNode->grades[i]);
    }
    newNode->next = NULL;
    return newNode;
}
 
// ฟังก์ชันเพิ่ม Node เข้าไปใน Linked List
void addNode(struct Student** head, struct Student* newNode) {
    newNode->next = *head;
    *head = newNode;
}
 
// ฟังก์ชันแสดงข้อมูลนักเรียนทั้งหมด
void printList(struct Student* head) {
    struct Student* current = head;
    while (current != NULL) {
        printf("\nชื่อนักเรียน: %s\n", current->name);
        for (int i = 0; i < NUM_SUBJECTS; i++) {
            printf("  %s: %.2f\n", current->subjects[i], current->grades[i]);
        }
        current = current->next;
    }
}
 
// ฟังก์ชันปลดปล่อยหน่วยความจำ
void freeList(struct Student* head) {
    struct Student* current = head;
    while (current != NULL) {
        struct Student* temp = current;
        current = current->next;
        free(temp);
    }
}
 
int main() {
    struct Student* head = NULL;
    struct Student* newNode;
 
    // สร้างและเพิ่ม Node ทั้งหมด
    for (int i = 0; i < NUM_STUDENTS; i++) {
        newNode = createNode();
        addNode(&head, newNode);
    }
 
    // แสดงผลข้อมูลนักเรียนทั้งหมด
    printList(head);
 
    // ปลดปล่อยหน่วยความจำ
    freeList(head);
 
    return 0;
}
 

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